HP Color LaserJet CP2020 Service Manual - Page 86
Image-formation system,
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Image-formation system The image-formation system forms a toner image on media. The product includes four print cartridges that contain the toner. Toner is applied in the following order, using only the colors necessary for a specific image: yellow (Y), magenta (M), cyan (C), and black (Bk). Figure 5-8 Image-formation system Fuser uni t Cartridge ITB cleaning unti Laser scanner Laser beam Photosensitive drum Secondary transfer roller ITB High-volt age power supply DC controller Primary transferpad Image-formation process Laser printing requires the interaction of several different technologies including electronics, optics, and electrographics to provide a printed page. Each process functions independently and must be coordinated with the other processes. Image formation consists of the following processes: ● Latent-image formation ● Development ● Transfer ● Fuser ● ITB cleaning ● Drum cleaning 66 Chapter 5 Theory of operation ENWW